Wide-angle optical system
A wide-angle optical system (10, 11), for a detector (32) for the infrared spectral region, comprise a lens system which, in the direction from the object side to the image side, consists of: a. an inverse Galileo telescope (20) with a negative lens (22) and a positive lens (24), and b. an arrangeme...
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| Sprache: | eng |
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| Zusammenfassung: | A wide-angle optical system (10, 11), for a detector (32) for the infrared spectral region, comprise a lens system which, in the direction from the object side to the image side, consists of: a. an inverse Galileo telescope (20) with a negative lens (22) and a positive lens (24), and b. an arrangement (12) of three additional lenses (14, 16, 18), one lens (18) being negative and two lenses (14, 16) being positive. Mirror 34 may be present between lenses 22 and 24. The lenses may be made of germanium or silicon. Window 26, cold filter 28 and cold stop 30 are shown. |
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